Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – For cleaning a specific substrate or removing a specific...
Reexamination Certificate
2002-01-16
2004-01-06
Kopec, Mark (Department: 1751)
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
For cleaning a specific substrate or removing a specific...
C510S140000, C510S159000
Reexamination Certificate
active
06673755
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to personal cleansing compositions comprising cleansing and skin active phases separated by one or more packaging barriers.
BACKGROUND OF THE INVENTION
Personal cleansing compositions that provide skin and hair conditioning benefits are well known. Many of these compositions are aqueous systems comprising an emulsified conditioning oil or other similar material in combination with a lathering surfactant. Although it is convenient to use a single composition or product that provides both conditioning and cleansing benefits, it is often difficult to formulate a physically stable emulsion that contains an effective combination of a cleansing surfactant and a skin or hair conditioning material.
One attempt at providing conditioning and cleansing benefits from a single personal cleansing product has been the use of dual stream packaging. These packages comprise separate cleansing compositions and conditioning compositions, and then allow for the co-dispensing of the two in a single or dual stream. The separate conditioning and cleansing compositions thus remain separate and physically stable during prolonged storage and just prior to application, but then mix during or after dispensing to provide improved conditioning and cleansing benefits from a physically stable system. Although such dual delivery systems often provide improved conditioning benefits, they also tend to feel greasy or sticky during application and thus leave the skin feeling oily and unclean.
It has now been found that dual delivery systems containing separate cleansing and conditioning streams can be formulated to provide improved cosmetics and skin feel during and after application while also providing excellent skin conditioning and cleansing benefits. It has been found that such a dual delivery system can be formulated with solid non-structuring particulates preferably having an average particle diameter of from about 1 &mgr;m to about 100 &mgr;m. These solid particulates are formulated into the active stream at a concentration of from about 1% to about 90% by weight of the composition, to provide the desired cosmetic and skin feel benefits. It has been found that the use of such particulates in the formulation is especially useful in reducing the greasy and tacky skin feel associated with the use of a separate conditioning stream, while also allowing for the stability benefits and enhanced conditioning benefits associated with the use of such a dual stream system. It has also been found that the above-described particulates are also helpful in improving the cosmetics of other dual delivery systems, wherein the conditioning stream is replaced with a skin active stream, especially a non-aqueous skin active stream.
It has also been found that the dual delivery systems can be formulated as personal cleansing compositions with selected skin active agents that provide improved chronic skin benefits to the desired area of the skin. These compositions comprise a cleansing phase containing a cleansing surfactant and water, and an active phase containing selected chronic skin benefit agents, wherein the cleansing and active phases are physically separated from one another by one or more packaging barriers.
It has also been found that the dual delivery systems can be formulated as personal cleansing and conditioning compositions with improved cosmetics and skin conditioning benefits, wherein the compositions comprise a cleansing phase containing a cleansing surfactant and water, and an active phase containing at least about 10% by weight of a lipophilic material having a solubility parameter of from about 5 to about 10, wherein the active phase has a Consistency Value of from about 1 to about 2,000 poise and a Shear Index of from about 0.1 to about 0.8, and wherein the cleansing and active phases are physically separated and dispensed independently from one another from separate packages, preferably separate packages removably located in a single packaging system or kit.
It has also been found that the personal cleansing and conditioning compositions of the present invention can be packaged in dual stream packaging systems comprising a separate compartment for the conditioning or skin active phase and a separate compartment for the cleansing phase, or they can be packaged in separate packages, including separate packages provided in a kit where each separate package is detachable from the kit and separately dispensable onto the desired application surface.
It is therefore an object of the present invention to provide personal cleansing compositions comprising cleansing and skin active phases that are physically separated from one another by one or more packaging barriers, and which provide improved cosmetics, improved skin active benefits, or combinations thereof.
SUMMARY OF THE INVENTION
The present invention is directed to personal cleansing compositions comprising: (A) a cleansing phase containing a cleansing surfactant and water; and (B) an active phase containing (i) a lipophilic carrier; and (ii) solid, non-structuring, particulates preferably having an average particle diameter of from about 1 &mgr;m to about 100 &mgr;m; wherein the cleansing and active phases are physically separated from one another by one or more packaging barriers. These compositions provide improved cosmetics and skin feel during or after application, especially reduced greasy skin feel. The active phase may further comprise a skin active agent.
The present invention is also directed to personal cleansing compositions comprising: (A) a cleansing phase containing a cleansing surfactant and water; and (B) an active phase containing selected chronic skin benefit agents, wherein the cleansing and active phases are physically separated from one another by one or more packaging barriers. These compositions provide improved cosmetics and skin feel during or after application, and are especially useful in providing improved deposition or effectiveness of selected chronic skin benefit agents to the desired area of the skin.
The present invention is also directed to a method of cleansing the skin by combining two separate compositions: (A) a cleansing phase containing a cleansing surfactant and water; and (B) an active phase containing at least about 10% by weight of a lipophilic material having a solubility parameter of from about 5 to about 10, a Consistency Value of from about 1 to about 2,000 poise, and a Shear Index of from about 0.1 to about 0.8, wherein the cleansing and active phases are located in and dispensed independently from separate packages. These compositions provide improved cosmetics and skin feel during or after application, and are especially useful in providing individual consumer control over the optimal relative amounts of each of the cleansing and active phases to be delivered to the desired area of the skin, depending upon the unique skin care needs of the individual consumer.
DETAILED DESCRIPTION
The personal cleansing compositions and methods of the present invention comprise or are directed to physically separated active and cleansing phases. These and other essential limitations of the compositions and methods of the present invention, as well as many of the optional ingredients suitable for use herein, are described in detail hereinafter.
The term “anhydrous” as used herein, unless otherwise specified, refers to those compositions or materials containing less than about 10%, more preferably less than about 5%, even more preferably less than about 3%, even more preferably zero percent, by weight of water.
The term “volatile” as used herein, unless otherwise specified, refers to those materials having an average boiling point at one (1) atmosphere of pressure (atm) of less than about 250° C., more typically less than about 235° C. at one (1) atm.
The term “ambient conditions” as used herein, unless otherwise specified, refers to surrounding conditions at one (1) atmosphere of pressure, 50% relative humidity, and 25° C.
The term “non-structuring particulates” as used her
Albacarys Lourdes Dessus
Putman Christopher Dean
Smith, III Edward Dewey
Thomas Cheyne Pohlman
Wei Karl Shiqing
Clark Karen F.
Howell John M.
Kopec Mark
Petruncio John M
Rosnell Tara M.
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